Yesterday I've airbrushed Pebeo Gloss varnish on the kit:
Then, today, it was the wash phase:
First, some dots of oil paints (I've used medium green, dark brown, white, yellow and red)
Next step is the use of a paintbrush with turpentine. The paintbrush is used always in the same direction; that gives some nuances in the basic paint that reproduces effects of weather, sun, etc...